I will describe the results of several spherically symmetric
core collapse supernova simulations performed with
AGILE-BOLTZTRAN, a state-of-the-art radiation hydrodynamics
code incorporating Boltzmann neutrino transport.

The marked similarities observed in all these simulations
highlight the need for both improved progenitor models and
the incorporation of improved microphysics in modern
supernova codes. Spherically symmetric simulations are, for
the immediate future, the only computationally feasible way
to investigate the nature of the explosion mechanism while
including the requisite level of detailed neutrino
transport. They also provide one of the few opportunities to
delineate the effects of various feedback mechanisms present
in the problem.

This research was supported by funds from the Joint
Institute for Heavy Ion Research and a DOE PECASE award, and
made use of the resources of the National Energy Research
Scientific Computing Center, which is supported by the
Office of Science of the U.S. Department of Energy under
Contract No. DE-AC03-76SF00098.

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